\begin{tabular}{l*{4}{c}} \hline\hline
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                &\multicolumn{1}{c}{leakage}&\multicolumn{1}{c}{leakage}&\multicolumn{1}{c}{emissions}&\multicolumn{1}{c}{emissions}\\
\hline
Treatment       &    19.68&    16.15&    17.28&    13.94\\
                &  (14.51)&  (12.24)&  (22.50)&  (19.17)\\
Treatment Intensity&    -7.06&    -3.22&    19.76&    19.87\\
                &   (8.98)&   (6.46)&  (23.17)&  (19.39)\\
Constant        &     5.92&   -26.55&    35.49&    45.75\\
                &   (1.84)&  (20.29)&   (9.04)&  (48.19)\\
\hline
Controls        &         &        Y&         &        Y\\
\hline R\textsuperscript{2}&     0.05&     0.25&     0.09&     0.15\\
Observations    &       51&       49&       51&       49\\
\hline\hline
\end{tabular}
